Electric signaling system.



E. E KLELNSGHMI'DT. {ELECTRIC SIGNALING SYSTEM. APPLIOATION FILED AUG. 7, 907.

Patented Dec. 1,1908

, nects by 14: with the running gear of the carcircuit EDWARD E. KLEINSOHMIDT, OF NEW YORK, N. Y.

ELECTRIC SIGNALING QYSTEM.

Specification'of Letters Patent.

Patented Dec. 1, 1908.

Application filed August 7, 1907. Serial No. 37,387.

{ applicable to railways and is shown for illustrative purposes as applied to a railway or more rmrticularly to an electric railway operating on direct current.

111 the drawung the figure 1s a diagrammatic view of the system applied to a directcurrent railway.

Describing now my improvements with special reterence to the devices of the drawings :-ll are the tracks of anelectric railway system, insulated into block-sections,

three of which are shown at X, Y,-Z.

2 designates a power distributing conductor, in this specific embodiment taking the form of an over-head trolley-wire. This conductor 2 is in sections with impedance coils 3 connected across the sections. Said impedance coils or other equivalent devices permit the power current to pass but not the alternating current.

a is a direct current generator connected across trolley-wire 2 and rails 1-1, an impedance 5 being interposed between the genorator and trolley wire and part of a coil 6 between the generator and the rails. This coil 6 is connected across the rails and the generator connects with the middle of said coil. The coil 6 in block X is duplicated in each of the blocks Y and Z. A coil 7 in each of the blocks is connected across the rails of its own block and durthermore connects by a wire 8 with the coil 6 of the adjoining block. Preferably the wires 8 connect the coils 6 and 7 at central points in their windings as shown in the figure. Upon inspection these connections will be seen to energize both rails in all the blocks from the power generator y f 9 is a car in block Y with trolley-pole or other traveling contact device 10. The motor 11 or" the car, receives its current from trolley-wire 2 through ole l0 and impedance 12., The other brus i ofthe motor conand thus completes the ower through the. motor to the rai s.

' Describing nowvlthesignaling circuitylfi" is an alternating current generator connected across the coils 6 and line wire 16 Said line wire 16 connects with one rail in each block through transformer coils 17. The same rail in eachblock connects with the section of trolley-wire in the block behind through transformer coils 18 and condensers 19. It will be understood that the coils 6, 17, 7, l8 constitute transformers the operation of which will hereafter be described. Carried by the car is a semaphore or other signaling device 20 operable by an alternating current. In the particular device illustrated, the semaphore is operated by solenoid 21 into clear position and when no current is passing through the solenoid, takes the danger position shown by the gravity action of Weight 22. Said solenoid 21 connects by one terminal With the'running gear of the car and by the other through a condenser 23 with the trolley-pole. Any-convenient form of signposts 24 may be setup to mark the divisions between the blocks conveniently to tho motorman. 25 represents a car in the block X ahead 0 car 9 in section Y.

Explainingmow how the presence of car 25, sets the signal at danger in a car in the block behincLan inspection of the circuits in the figure will show that the generator 15 delivers its alternatin current through coil 17 and through half 0% tion. The effect of this is to induce a currentin coil 6 which will traverse the circuit formed by said coil 6, they two rails and the coil 7 connected across said rails at the other end or the block. Ordinarily this current in coil? would induce a current in coil 18 to. clear the signalnin any car in the block behind, butnot when thereis a car 25 in the block ahead,'since the wheels and axles of thiscar short circuit coil 7-in block X and consequently there is no current in said coil to induce any current in coil 18. Consequently there being no current to operate the signal in the car, said signal gravitates into danger position, thereby indicatingthe car 25 in the block ahead. When said car 25 has proceeded out. of block X, the coil 7 in said block being no longer short-circuited, receives current from coil 6, and itself in dnces a current in coil 18 which energizes solenoid 21 to clear the signal and, does so, bytmversing the following circuit, from -":CQil 18 130 condenser 19, to trolley-wire sec-t .tion-in; block Y, to trolley pola to condenser coil 6 in each block-sec 23, to solenoid 21. to running-gear, by reiis to coil 6, by connecting wire as to COll 'Z, to rail in block 2i back to coil 18. in making this circuit, the currentiroin coil lb Wlil not short-circuit through themotor on account of the impedance 12. On the other hand the condenser bars the power cur rent from the signal or solenoid circuit but permits passage tnereto of the signal currenn bnnilerly the condensers l9 prevent the power current from short-circuning to the rails from the trolley-Wire section's.

From the Ioregoing, it will be clear how the signal in the cur uutonmucally clears or inoxes L0 danger depending on tne presence or a car in the block. ahead.

Having thus described my invention, whet I claim is.'.

1. in an alternating current signaling systern the combination or s trackwuy in blocksections, adapted each to be short-circuited across its rails without short-circuiting the other sections; a sectional conductoralong the tracltwey; a transformer in each section or trsckwey, with one member connected across the tracks and receiving an alternating current supply, and with its other member delivering its current of induction to a signal device in a cur through connections between said other transformer rneinber end the truclmwiyv and the section behind of sectionnl conductor.

2 in an uiterncting current signaling sys tem, the combination of a, track-Way in block-sections; e, sectional. conductor along the trs-clrway; o transformer in each section of trimming receiving an alternating current supply and connected to be shortcircuiteti by at car in its section of trecirwziy, and lim ing its secondary member connected with the treckway and section oi sectional conductor behind to deliver its current to a signal device in a car on seici trucks/11y.

3. in combination. e trucks/e3 in blocksections; a power-conductor along the track- Wuy adapted to be continuous for direct and discontinuous for alternating current; a source of direct current supply connected across the power-conductor and the sections or trnckway; a transformer in each bioclo section with one of its members connected to sense? receiving an sitoinuting-rurrmlt supnly umi with its secondary connected bem'eou the trnckwziy and the section of )owoncomimztor behind through a device impassable to direct current; and an alternating current signal carried by car and connected to derive ollcrnei'ing current from the and rails but to exclude the (ill'kt'ill current.

in combination, :1 ti'uckwuy in biochsectio: adopted each to be 5ll li',-\'iI'Ulliitd across its rails Without shorccircuiting the other sections corner-conductor in sections separated by impedance; :1 source of: direct current supply connected ncross the non-"en cnductor anti the sections of trnclnvsy; at coil in each block connecti across source of alternating current sup ne with one of the terminals of said coil in contact with or rail, said coil forming one member of transformer, the other member of which is connected across the rails; a second transformer in each block comprising a coil connected across the rails of the block and further comprising at coil 1onnectirig; by e circuit corrupted to carry only ulteriiutting currents, the trecim'oy with the section be-- hinci of power-conductor; and signaling; apparatus carried by :1 car and connected. to operate from alternating current received between the power-colniuctor anti the truck: Way.

6. In combination, 2L mnkwsy in block actions atinpteti each to be shortrircuitcu across its rails Without sbort-circuitine the oth sections; 2 power-conductor in sections mi seunrsteii b none lance; two coils in each l J r blocit connected across the ruiis, with :ui

jccent coils of the different connecteci; :1 source of direct current connected across the power-combrotor mn'i the sections of traclrwoy; means odcptcti to impress an alternating current in the circuit consisting in each block of the rails and the aforesaid coiis across them; and s secondary circuit adapted to be impressed with an induced current from the foregoing; circuit and to deliver it to an alternating current signal in e car on the bloclr behii'id.

7. in combination, a truclmuy in bloclo sections, adapted each to be shortrircuited across its rolls vithout. shorocircuiting the other sections; separated by impedance; two coiis in each block connected ocro the rails with adjacent coils oi": the differ: connected at initiri. ings; c

:reni. connected across and the sections of tracmr means our nod to heiress on alternati current in 1.. in each bio of be me coils across ti'icin; i adapted to be iinli.

some? current from the foregoing circuit and con-' nected to the trackway and through a con-, denser to the section behind of power-con doctor; and a signal carried by a car, connected to derive alternating current from the power-conductor and trackway but to exclude direct current.

8. In combination a trackway in blockscctions adapted each to be sho'rt-circuited across in rails without short-circuiting the other sections; a ower conductor*alonguthe trackway adapter? to be discontinuous for alternating current; circuit connected across the rails in each block, adapted eX- ceptwhen short-circuited', to impress an alternating current 11 on the power-conductor and trackway ehind; and a signal carried by a car and connected to receive sald alternatlng current from the power conductor and trackway.

In combination; a trackway block sections adapted each to be short-circulted across its rails Without short-circuiting the other sections; a sectional conductor along the trackway; a circuit connected across the rails in each block, adapted when not shortcircuited by a car in the block to impress a current upon the trackway" and section of EDWARD E. KLEINSGHMIDT;

Witnesses: E. W. Scmmn, J12,

H. R. BAUER. 

